Annunciator



June 24, 1930. N. UNGER 1,757,233

ANNUNCIATOR Filed Sept. 17, 1924 2' Sheets-Sheet l INVENTOR. M TH/i/Y UYGER.

A TTORNEY;

June 24, 1930. N. UNGER 1,767,233

' ANNUNCIATOR Filed Sept. 17, 1924 2 Sheets-Sheet 2 .INVENTOR. M77114 MYGER.

ATTORNEY.

Patented June 24, 1930 PAT oFFIcE NATHAN UNGER, OR NEW YORK, N. Y.

ANNUNCIATOR This invention relates to annunciators and more p'articularly to a novel and improved apparatus the operation of which is positive and reliable.

The 'most important object of my invention is to provide for use in a burglar alarm or other protective system an annunciator, which operates to indicate the closing of an open circuit or the opening of a closed circuit.

Another object of my invention is the construction of an annunciator which is operable by either a closed circuit or an open circuit to close another circuit.

To enable others skilled in the art to fully comprehend the underlying features of my invention, that they may embody the same in the various modifications in structure and relation contemplated, drawings depicting a preferred form have been annexed as a part of this disclosure and in such drawings, similar reference characters denote corresponding parts throughout all the views, of which,

Figure lis a front View of an annunciator constructed in accordance with my invention.

Figure 2 is a view taken on the line 5--5 of Figure 1.

Figure 3 is a plan view of the annunciator shown in Figure 1.

Referring to the drawings in detail in which a master instrument is illustrated embodying the annunciator mechanism, numeral 29 designates a frame in the rear portion of which are mounted two relays indicated generally by the numeral 30, each comprising two coils 31, 31 cooperating respectively with armatures 32, 32", the armature 32 being under tension of the spring 33 attached thereto and the opposite end of the spring connected to an adjusting screw 34. The two lower electromagnetic coils 31 of an open circuit cooperate with the armature 32 directly below the armature 32 of the closed circuit which armature32 is operated by the two coils 31.

The armature 32 is attracted and is held under slight tension of the spring 33 so that when the circuit is broken, the armature Application filed September 17, 1924. Serial No. 738,252.

will be released. In the open circuit, however, the armature 32 will be attracted when the magnets 31 are energized and the open circuit becomes closed. Referring particularly to Figure 2, it will be seen that each armature is connected by a link 35 to a bent arm 36, each of said arms having a pin 37 in the end thereof, extending through a slot 38 of a sliding trip plate 39. The trip plate extends through a guide &0, secured to the side wall ll of the frame. A similar guide 12 is provided for the respective arms 36, it being noted that the sliding trip plate 39 is under slight tension of the small spring 43 connected to the guide 40. The sliding plate is adapted to be moved inwardly and outwardly when the armature 32 is released or when the armature 32 is attracted, in which instance the closed circuit and'the open circuit are independent of each other in affecting this operation. On the sliding trip plate, a lug or extension 4 1 is provided and is adapted'to engage the lower end 45 of the bent arm 46, which arm is mounted on one end of a square shaft 47,- said shaft being adapted to oscillate or partially rotate between the sides 48 of an extension formed with the frame heretofore referred to.

Attached to the shaft 47 and movable therewith is a circuit closing annunciatordrop 49 which is provided with a knife switch blade 51, adapted to engage the forked contact 52 of a short rod 53, see Figure 2. The bevelled end 54: of the rod 53 is adapted to engage the spring catch or lock 55, mounted on the knife switch and below the annunciator drop 4:9,so that when the said drop is released by the arm 16 and completes a circuit, it causes an alarm. A finger piece 55 permits the catch 55 to be released manually to the full line position as indicated in Figure 2 and thus the sliding trip plate may be set after the alarmcircuit has been broken. In connection with the annunciator drop, a signal lamp 56 in a socket 57 is provided so that it may be readily determined from suitable openings in a casing which master instrument has been operated.

Attached to the side of the frame 29 by a bracket 60, is what I term a no current relay, the magnet 61 of which cooperates with an armature 62 to which a spring contact 63 is attached. The said contact 63 extends between adjusting screws 64, 64, of a support 66. The armature 62 is connected to a rod 67 by a spring 68 for the urpose of biasing the armature. A trolib relay ismounted on the frame on the opposite side of the no current relay and also comprises an electromagnet 76, armature I7, and spring contact arm 78, similar in construction with the mechanism just described in connection with the no current relay.

While I have illustrated and described my ,'nvention with some degree ofparticularity, realizethat in practice various alterations therein may be made. I therefore reserve tlie; right and privilege of changing the form 0 the details of construction or otherwise altering the arrangement of the correlated ,parts without departing from the spirit of .theinventicn orthe scope of the appended v ,Havingthus described myinvention, what vInlaim as new and desire to secure by :United States Letters Patent is 1. In an instrument of the class described, .a plurality of relays-each of which hasgtwo said switch anda plin on said plate for en- .gaging said arm, t e pin being adapted to release said arm on a movement of said plate. 7

2. An instrument of the class described comprising a plurality of relays each of which has .two coils, an independent armature for each relay, one of said armatures being normally attracted and the other armature normally unattracted, a movable plate connected to both of-sa-id armatures, a circuit closing switch adapted to be oper- --.ated b a movement of said plate, a contact .for re easable engagement with the switch, andaffinger piece on the switch for permitting manual release thereof.

, 3. In an instrument of the class described, .aipklrality of relays, an independent armature for each relay, links connected to-each armature, a sliding plate movable by the link connected'to the actuated armature, a

icirmitclosing switch, a pin on said plate for maintaining the switch open and said pinpermitting said switch to close upon a sliding movement of said plate.

- 4. An instrument of theclass described,,a I

plurality of relays, an'independent armature for each relay, links connected to each of theiarmatures, a sliding plate movable by link connected to the actuated armature, a circuit closing switch, an extended arm connected to said switch,:a projection on the pivoted switch, a retaini arm is set where y coils, an armature for each relay, a slide plate for releasing said arm when the said plate is actuated and means for locking said switch in its closed position.

5. Aninstrument of the class described com rising a plurality of relays, an indepen pint arm'zltluni it}; each relay, link? Elonnecte toe o t annatureaasi'ng plate movable b eitltgr of the links, a pivoted circuit 0 osing switch, a retaining arm thereon, a pin on the plate, against whichthe refining arm is set, whereby the arm is releasably held by the sliding element and means for automatically locking said switch when closed 6. An instrument of thr 'class described com rising a plurality ofrelays, an indepen ent armature for each-agelay, links connected to each of the armatures, ashding plate movable by either of the links, a arm thereon, 8. ch the retaining the arm is releasably held b the sliding plate, a catch for automatica ly lockingsaid switch when closed and a finger knob on the switch for permitting Inanual-release thereof.

In testimony whereof I afiix m signature.

pin on the plate a ainst NATHAN UNGE ns 

